Improvement in slides for extension-tables



w. s. HOLLAND &1. w. PARKER.

Slides for Exfension-Tahles.

. No. 166,264. Patented Aug.3,1875.

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N PETERS, PHOTOUTHOGRAFHER WASHINGTON D c UNITED STATES PATENT QFFICE.

WALLACE S. HOLLAND AND JOSIAH W. PARKER, OF VERGENNES, VERMONT.

IMPROVEMENT IN SLIDES FOR EXTENSION-TABLES.

Specification forming part of Letters Patent No. 166,204, dated August 3, 1875; application filed J nne 7, 1875.

To all whom it may concern:

Be it known that we, WALLACE S. HOLLAND and J OSIAH W. PARKER, of Vergennes, in the county of Addison, in the State of Vermont, have made. certain Improvements in Slides for Extension-Tables, of which the following is a specification The object of this invention is to produce a slide that has a greater length of leverage and a more perfect guide in the runner-bars than is had by the usual construction; and it consists in the construction of the slide and the grooves in the runner-bars, as will be fully hereinafter described.

1 In the drawings, Figure 1 represents a perspective of the runnerbars extended, and the grooves therein that receive the slides; Fig; 2, an end view of same; Fig. 3, an end View of two runner-bars with their grooves; Fig. 4., the same with slides in the grooves, and Fig. 5 an enlarged end View of the metallic slide.

A represents the extension runner-bars, having grooves in their sides to receive the metallic slides. The grooves a are formed in the runner-bars at right angles to their faces, and terminate at a in each of the runner-bars, and midway, or about midway, of their depth are grooves a, at right angles with and extending from each side of groove a, to have the metal slides to take their hold in the runner-bars A. B is the metal slide, in the form of a double cross, as seen in Fig. 5, having the body b terminating in ends I) b, and having the rightangled projections 12 b at a proper distance from each end b. These metallic slides are inserted in the grooves 00 in the runner-bars A, in the usual manner, so that the runner-bars can be extended or drawn out, as seen in Fig. 1, and have the usual stops as to stop against in the extent of their reciprocations in either direction.

This construction of slides and their grooves in the runner-bars to receive them and. allow reciprocation of the runnerbars upon each other affords a greater amount of leverage to resist the tendency of the runner-bars, by their weight, to sag or fall, and thereby cause friction and make the runner-bars hard to operate, all of which is due to the extension of the ends I) of the metallic slides beyond the right-angled transverse projections b I), which take into and slide in the extended groove a of the grooves a in the runner-bars, beyond the rightangled projections a, in the grooves, which receive the projections 12 of the slide, and thereby prevent the strain upon the upright sides of the projections b, as is ordinarily the case where the groove has no extensions a, or the slide no extension I). I

What we claim, and desire to secure by Letters Patent, is-

1. The metallic slide B, having the exten sions b beyond the right-angled projections b b of body I), in the manner and for the purpose substantially as described.

2. The runner-bars A, having the grooves a formed with the extensions it beyond the upright and right-angled grooves a, in the manner and for the purpose substantially as described.

3. The combination, in extension-tables, of the metal slides B, having the extension ends I), with the runner-bars A, having the grooves a and the terminal grooves a, to receive the metal slides, in the manner substantially as specified.

Witnesses H. M. SMITH, EMERSON HOLLAND. 

